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Update classmethod.md

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`@@ -16,6 +16,27 @@ Python classmethod() built-in function`
`16`	`16`	`</base-disclaimer-content>`
`17`	`17`	`</base-disclaimer>`
`18`	`18`
`19`		`-<!-- remove this tag to start editing this page-->`
`20`		`-<empty-section />`
`21`		`-<!-- remove this tag to start editing this page-->`
	`19`	`+##Examples`
	`20`	`+`
	`21`	+```python
	`22`	`+classCounter:`
	`23`	`+def__init__(self):`
	`24`	`+self.count=0`
	`25`	`+`
	`26`	`+defincrement(self):`
	`27`	`+self.count+=1`
	`28`	`+returnself.count`
	`29`	`+`
	`30`	`+@classmethod# passes the class as the first argument to the method instead of passing the instance`
	`31`	`+defget_new_instance(cls):`
	`32`	`+returncls()`
	`33`	`+`
	`34`	`+if__name__=="__main__":`
	`35`	`+ counter= Counter()`
	`36`	`+print(counter.increment())`
	`37`	`+# 1`
	`38`	`+`
	`39`	`+ counter= counter.get_new_instance()`
	`40`	`+print(counter.increment())`
	`41`	`+# 1`
	`42`	+```

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